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Finding the Fourth Proportional to 7,915.59, 10,921.17 and 4,558.32

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Solution

The fourth proportional to 7,915.59, 10,921.17 and 4,558.32 is: 6,289.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,915.59 : 10,921.17 = 4,558.32 : x
  2. Step 2: Convert to fraction form
    7,915.59/10,921.17 = 4,558.32/x
  3. Step 3: Cross multiply
    7,915.59x = 10,921.17 × 4,558.32
  4. Step 4: Simplify right side
    7,915.59x = 49,782,164.84
  5. Step 5: Solve for x
    x = 49,782,164.84/7,915.59
  6. Step 6: Final answer
    x = 6,289.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.